Variables in Python

☞Named labels, whose values can be used and processed during program execution is known as variable.

☞When you run any program, it consumes memory in RAM till its execution in the process.

☞Examples : X = 5; _Y=3.5

☞It consumes memory dynamically and hence it is dynamically typed language (Not only the value of a variable may change during program execution but the type as well)

☞Value of a variable is stored at some location and that location will have address.

☞To find the address of the value of a variable : use id() function

☞To find the type of a variable : Use type() function

☞ Example :

x=3
print(type(x))
print(id(x))

<class ‘int’>   # type of variable x
1467205584      # address of variable x

☞ Concept of a variable

Example :

x=10
print(id(x))
y=10
print(id(y))
y=5
print(id(x))
print(id(y))

1472120896    #address of x
1472120896    #address of y
1472120896    #address of x
1472120816    #address of y

☞Object is capable to store a set of values and can invoke a set of operations.

☞Every variable in Python is an object.